Tacky polyurethane composites

Abstract

A number of tacky polyurethane or other gel comprising composites are provided. The composites have foam carriers, which may be open cell, semi-open cell, reticulated or closed-cell foam. The tacky gel which, in one embodiment, may be polyurethane, typically comprising a thin surface coating on the foam gel and the foam is partially or fully saturated with the same gel comprising the thin surface layer of the foam. The skeletons may be included in the composite to provide additional structure integrity, and a moisture proof layer may be added to the top and/or bottom surfaces of the foam/gel.

The invention claimed is: 
     
       1. A gasket tape, the gasket tape comprising:
 a first foam layer and a second foam layer each with an outer and inner surface, the outer surface being sticky; 
 a polytetrafluoroethylene (PTFE) layer; 
 wherein the first and second foam layers lay to either side of the PTFE layer and the outer surface of the first foam layer and the outer surface of the second foam layer comprise a first and second outer surface of the gasket tape. 
 
     
     
       2. The gasket tape of  claim 1  wherein at least one of the foam layers comprises a gel. 
     
     
       3. The gasket tape of  claim 1  wherein at least one of the foam layers comprises a pressure sensitive adhesive. 
     
     
       4. The gasket tape of  claim 1  wherein at least one of the foam layers comprises a cured polymer. 
     
     
       5. The gasket tape of  claim 1  wherein the foam layers comprise closed cell foam. 
     
     
       6. The gasket tape of  claim 1  wherein the inner surface of the first and second foam layers is in contact with the PTFE. 
     
     
       7. A gasket tape, the gasket tape comprising:
 a first foam layer and a second foam layer each with an outer and inner surface, the outer surface being sticky; 
 a PTFE layer; 
 wherein the first and second foam layers lay to either side of the PTFE layer and the outer surface of the first foam layer and the outer surface of the second foam layer comprise a first and second outer surface of the gasket tape; 
 wherein at least one of the foam layers comprises a pressure sensitive adhesive; and, 
 a wherein at least one of the foam layers comprises a cured polymer. 
 
     
     
       8. The gasket tape of  claim 7  wherein the first and second foam layers comprise closed cell foam. 
     
     
       9. The gasket tape of  claim 8  wherein at least one of the foam layers comprises a cured polymer. 
     
     
       10. The gasket tape of  claim 8  wherein at least one of the foam layers comprises a pressure sensitive adhesive. 
     
     
       11. A method of sealing between an aircraft floorboard and a stringer that supports the floorboard, the method comprising the steps of:
 providing a gasket tape, the gasket tape comprising: 
 a first foam layer and a second foam layer with an outer and inner surface, the outer surface being sticky; 
 a PTFE layer; 
 wherein the first and second foam layers lay to either side of the PTFE layer and the outer surface of the first foam layer and the outer surface of the second foam layer comprise a first and second outer surface of the gasket tape; 
 placing the gasket tape between the stringer and floorboard; and 
 fastening the stringer to the floorboard. 
 
     
     
       12. The method of  claim 11  wherein the gasket tape comprises a tape.